Acute interstitial pneumonia in feedlot cattle
dc.contributor.author | Valles, Jose Antonio | |
dc.date.accessioned | 2013-04-25T20:51:44Z | |
dc.date.available | 2013-04-25T20:51:44Z | |
dc.date.graduationmonth | May | en_US |
dc.date.issued | 2013-04-25 | |
dc.date.published | 2013 | en_US |
dc.description.abstract | Acute Interstitial Pneumonia (AIP) is a costly issue that affects feedlot cattle, especially during hot and dry summers. Research has yet to elucidate the exact etiology of AIP; therefore this study was conducted to determine possible factors that contribute to AIP in feedlot cattle. During the summer of 2011 in a 55,000 head feedyard in southwest Kansas, animals exhibiting clinical signs of AIP were selected for ante-mortem examination and data collection. The animal population within the feedlot consisted of 75% heifers and 25% steers. Approximately 50% of the animal population was black hided animals. Ante-mortem data consisted of rumen gas cap measurement for NH3 and H2S, rumen pH, serum chemistry, rectal temperature, and body weight. Post-mortem cases with and without ante-mortem evaluations were also selected for an additional examination. Postmortem examination included similar data as ante-mortem examination with addition of visual and histological examination of lung tissue. There were 31 ante-mortem cases of clinical AIP with the following observations (mean ± SD): rectal temperature 105.3 ± 0.7 °F, weight 1098 ± 123 lbs., H2S 136 ± 133.3 ppm, and rumen pH 6.4 ± 0.5. Twenty-five healthy cohorts were selected from identical pens to serve as controls. Observations from control animals were: rectal temperature 103.7 ± 1.1 °F, weight 1113 ± 133.3lbs, H2S 269.8 ± 311.6 ppm and rumen pH 6.2 ± 0.6. A total of 61 post-mortem cases with a preliminary diagnosis of AIP were analyzed and displayed the following values: H2S 1279.7 ± 1569 ppm, and rumen pH 6.3 ± 0.36. Fifty-three of these postmortem cases had diffuse, focal and /or patchy AIP confirmed by histology. | en_US |
dc.description.advisor | Daniel U. Thomson | en_US |
dc.description.degree | Master of Science | en_US |
dc.description.department | Department of Clinical Sciences | en_US |
dc.description.level | Masters | en_US |
dc.identifier.uri | http://hdl.handle.net/2097/15619 | |
dc.language.iso | en_US | en_US |
dc.publisher | Kansas State University | en |
dc.subject | Acute interstitial pneumonia | en_US |
dc.subject | AIP | en_US |
dc.subject | Beef cattle | en_US |
dc.subject | Feedlot | en_US |
dc.subject.umi | Veterinary Medicine (0778) | en_US |
dc.title | Acute interstitial pneumonia in feedlot cattle | en_US |
dc.type | Thesis | en_US |